Total Access Time
The access time test measures the total latency across all 18 tests. This is one of, if not the most important test we run at this time for consumer SSDs. When your latency is low your computer feels fast, it's just that simple.
Low-cost SSDs will never be performance leaders, several of which we have on this chart. It's easy to spot the group of mainstream SSDs on the chart, as they are all grouped together in latency performance, minus the Transcend SSD 340 that shipped with immature firmware and the SanDisk Ultra Plus 256GB that outperforms the group. The PNY Optima does a bit better than the Ultra Plus, but if you buy one, you never know what controller it will ship with.
Disk Busy Time
In the final test, we measure the amount of time the drive worked to read and write the data to complete the test. When a drive is active, it uses more power so the faster it can complete the tasks the faster it can fall into a low power state.
Here we see the disk busy time, the amount of time the drive needs to work to complete a task, through the tests. This can affect battery life in notebooks if the drive has to work harder for longer amounts of time. The faster a drive can complete a task, the faster it can drop back down into a lower power state.
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